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Post Info TOPIC: Running OEM KK tack in a 66 with a HEI
jim larson


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Running OEM KK tack in a 66 with a HEI
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Is there something you have to do to be able to run a OEM Tack like the KK tack used in the 66 chevelle If you have a HEI ignition system? I currently have a SunPro tack from 1997 that a PO installed in the Blue Chevelle.  I have an extra original KK tack in the drawer.  I would like to use the KK tack if possible.  And then also be able to use it with the old distributor style ignition or an electronic ignition like Pertronix.



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Jim L

Lake City
more ambition than brains


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Will follow this closely as the white Elky is now set up for a Knee Knocker, but not yet wired.

Would hate to fry it!doh

tiphatthumbsup

Karl



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More ambition than brains,

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jim larson


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more ambition than brains wrote:

Will follow this closely as the white Elky is now set up for a Knee Knocker, but not yet wired.

Would hate to fry it!doh

tiphatthumbsup

Karl

my-factory-tach-will-not-work-with-my-hei-or-electronic-distributor



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Jim L

Lake City
67ss


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Never had a factory tach on a 66 but I did wire a factory tach on a 69 Chevelle to an HEI and it worked just fine. Not sure why it wouldn't work it is triggering off the coil and the only thing that would be slightly different is the voltage level to a points coil will be slightly lower then a HEI due to the resistance wire in the harness feeding the coil. But other wise a coil is a coil and it works the same. Just my 2 cents take it for what it is worth.



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Chris P
East Central, Mn

66 Chevelle 300 deluxe
Lost in the 60s


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I have 3 cars with Pertronix electronic conversions or all new distributors and all 3 have tachometers wired just like a points set up and no issues.

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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

Some Assembly Required

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS 350 rs
jim larson


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Lost in the 60s wrote:

I have 3 cars with Pertronix electronic conversions or all new distributors and all 3 have tachometers wired just like a points set up and no issues.

 So Mitch, are the new distributors HEI?  Are the tacks  OEM tacks from back in the 60's or like an Old Sun Pro tack in My blue chevelle that was made in 1997 ( thats the date stamped On the back of the Tack).  You probably have a KK tack in the 66  Is it an original tack or a reproduction?  

 

This article seems to indicate that only the HEI distributors from around 1975 to 1990 cause this interferance. hei-tachometer-signal-filter



-- Edited by jim larson on Friday 7th of August 2020 05:37:33 PM

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Jim L

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Lost in the 60s


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The Pertronix distributors are electronic, the COIL is HEI...45,000 volts.
My tachs are aftermarket and newer than 1997
The tach in my '66 is a newer Sun replica.
No experience with an aftermarket tach and an OEM, large body HEI. I don't care for them, as I replaced the pickup coils in MANY back in the repair business days and, to me, they look out of place on a 60's engine...dunno



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Mitch D.   River Falls, WI

Lifetime member of the "Cars apart Club"

Some Assembly Required

1966 Chevelle SS 396 M20

1970 Chevelle SS 396 M20

1967 Camaro SS 350 rs
jim larson


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Plan is to replace HEI distributor this winter. I was just thinking about installing the KK tack now.  I agree that Large body HEI looks out of place.



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Jim L

Lake City
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